You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I amend you today?

USER: I would like to go to a cooler climate this summer, so some of my friend suggested me to go Washington. Could you please reserve a ticket in a flight which is going to Washington?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

ASSISTANT: May I know your airport abbreviates?

USER: Sure, my source point is San Francisco, CA - SFO and destination is Washington, DC - IAD.

ASSISTANT: On which dates you would like to book the flight tickets?

USER: 08/09 and 08/11 are my planed dates so please check the availability on those dates.

ASSISTANT: Sure, how much can you afford for this journey?

USER: I have planned to spend 5000 for this particular flight ticket.

ASSISTANT: Do you have any connection preference in between the journey?

USER: Yes, I need a whistle stop in between my journey because one of my friend also join me in the middle of the journey.

ASSISTANT: Can you please provide me your name?

USER: Sure, Angela Lewis is my name.

ASSISTANT: Ok, please wait a moment I will check and get back to you.

USER: Ok, take your own time.

ASSISTANT: Sorry to say, no flights found with your specified dates.

USER: No problem, I will choose alternate source.

ASSISTANT: Thanks for availing us, have a good day.

USER: Thank you for your information.