You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Roberts.

ASSISTANT: How may I aid you?

USER: I have planned a trip to with my family in the month of November, so can you find a flight with in my budget 5000 and reserve a seat for me to travel?

ASSISTANT: Sure, I am here to help you. Can you please tell me your travel airport codes?

USER: Sure, I have planned to start from PHL which is my source and landing on IAD which is my destination.

ASSISTANT: Ok, on which dates you are willing to travel?

USER: I am willing to travel on 11/26 and return back after two days on 11/28.

ASSISTANT: Ok, I will search the flight with your details and let you know the flight availability.

USER: Sure, take your time and provide me the flight that is obtained on my dates.

ASSISTANT: Sorry to inform you, there are no flights available in this route on the dates you have provided.

USER: Not an issue with that one, I can reach another agency to book the ticket. Thank you for your service.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Most welcome.