You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I serve you?

USER: I am Richard Campbell. Can you please book me a ticket from DTW to OAK to meet my family friends?

ASSISTANT: Sure, is there any restriction on fare?

USER: As my budget is low so please make sure price limit should not exceed 200.

ASSISTANT: Let me know your travel dates?

USER: I would like to leave between 09/08 and 09/10.

ASSISTANT: There is a flight from SouthWest airline of fare 200 and flight number 1003. Shall I proceed?

USER: Yes, please book this ticket.

ASSISTANT: Your flight reservation is done.

USER: Thank you so much.

ASSISTANT: Thanks for choosing us.