You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: As I am a Doctor, I want to attend an emergency surgery in Los Angeles, CA - LAX. Can you book a ticket under a fare of 500?

ASSISTANT: Sure, May I know your journey dates?

USER: I need to travel on 11/05 and 11/07.

ASSISTANT: Let me know your source.

USER: I want to fly from Washington DC - IAD.

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

USER: OK.

ASSISTANT: Thank you for waiting, We found UA airline with number 1015 and fare is of 100 matched your details. Shall I go for it? May I know your good name please?

USER: Yes, please. Make the booking with the name Brian Anderson.

ASSISTANT: Ok, Your booking has been done with single connection.

USER: Thank you for your best service.

ASSISTANT: Thanks for choosing us, Have a nice journey.