You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: John Taylor here.

ASSISTANT: How can I assist you today?

USER: I would like to travel from SFO to HOU for a business meeting, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, will you mention your travel dates please?

USER: Sure, I am planning to leave on 06/09 and please book my return ticket on 06/11.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: There is no flights found under your preferable details.

USER: Oh! So sad to hear. Thank you for the information.

ASSISTANT: Welcome, have a great day.