You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: As my grandfather fell sick, I have to go to see him. So, please book me a ticket to DCA from JFK.

ASSISTANT: Sure, may I know the journey dates please?

USER: Please check with price limit, should not exceed 5000. And my journey details are from 07/18 to 07/20.

ASSISTANT: Ok, wait for a while I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting there is flight with one connection limit price of 100.Flight name is :UA and flight number is:1017.

USER: Ok, confirm a ticket on my name.

ASSISTANT: May I know your name please?

USER: I am Kevin Williams.

ASSISTANT: Your ticket has been booked.

USER: I am glad at your service, Thank you.

ASSISTANT: Thanks for choosing us.