You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,.

USER: I am Andrew Thomas.

ASSISTANT: How can I support you now?

USER: I would like to attend Conferences in California Academy of Sciences at San Francisco, CA - SFO. Can you please make a flight reservation under the range of 200?

ASSISTANT: Sure, I would be happy to help you. Please let me know your travel dates?

USER: I will fly on 12/05 and return on 12/07.

ASSISTANT: Can you help me with your origin point?

USER: My departure airport code is Houston, TX - IAH.

ASSISTANT: Thanks for the details, please wait.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT:  Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: That's fine, no issues. Thanks for your assistance.

ASSISTANT: Thanks for your presence, visit again!.