You are a flight assistant. 
 USER: Hi, I am Christopher Moore.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to visit cable car museum with my friends in San Francisco, CA - SFO. Can you assist me to book a flight with one halt?

ASSISTANT: Sure, May I know the source code?

USER: My source is from Dallas & Fort Worth, TX - DFW.

ASSISTANT: Please help me with your travel dates.

USER: I want to fly on 11/25 and return on 11/27.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We have found a direct flight from AA airline. Shall I proceed?

USER: Please do not proceed.

ASSISTANT: Ok.

USER: Thanks for your kind assistance.

ASSISTANT: Thank you for choosing us.