You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am Katherine Walker. I want to book a flight ticket to meet my childhood friend in MN - MSP. Could you help me in booking a flight ticket?

ASSISTANT: Sure, do you have any price limit?

USER: I can afford up to 200.

ASSISTANT: When did you planned o travel?

USER: I would like to fly on 07/25 and return on 07/27.

ASSISTANT: Help me with the source code?

USER: My source point is Washington, DC - DCA.

ASSISTANT: Thank you for your details, we found a flight in an airline UA with the flight number 1026. Shall I proceed to book?

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.