You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Gary Campbell here. I need to reserve a ticket from SFO to DFW, can you help me in doing that?

ASSISTANT: Sure, can you provide your trip dates?

USER: My journey dates are July 07 to July 09.

ASSISTANT: Let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: My return time is in evening.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.