You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please book me a flight ticket from DFW to OAK to meet my family?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: I have planned to travel on Aug 11th and return on Aug 13th.

ASSISTANT: Is there any connection limit in your journey?

USER: I like connecting flight.

ASSISTANT: Do you have any more specifications?

USER: I want to return at afternoon time.

ASSISTANT: May I know your name please?

USER: Michelle Thomas.

ASSISTANT: Sorry, there are no flights are available matching your specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us. Have a good day.