You are a flight assistant. 
 USER: Hello. I am Michael Davis.

ASSISTANT: Hello, how can I help you?

USER: I have planned to attend Sports festival at San Francisco, CA - SFO. Can you please book a ticket on 12/25?

ASSISTANT: Sure, we are here to help you. Can you share me your source point?

USER: My source point is Houston, TX - IAH.

ASSISTANT: May I know your return date?

USER: I intend to return on 12/27.

ASSISTANT: Do you need any halts in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, wait for some time I will check the availability of flights and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no flights found on your requested details.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for choosing us.