You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Deborah White.

ASSISTANT: What can I do for you today?

USER: I am planning to visit Monterey & carmel Explorer in San Francisco.So I need to book a flight ticket. Could you please assist me in booking a flight ticket with halt?

ASSISTANT: Sure, when would you like to travel?

USER: I would like to travel on 03/25 and return on 03/27.

ASSISTANT: Could you please provide your corresponding airport codes?

USER: My source and destination codes are from DC-DCA to CA-SFO.

ASSISTANT: Ok, please give me a minute. We found a flight with UA airline with fare of 200 matches your schedule. Shall I proceed with booking?

USER: Yes, you can proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1002.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.