You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Jessica King. Please search a flight ticket from SFO to DEN?

ASSISTANT: Sure, May I know your travelling dates?

USER: My trip dates are Oct 21 and Oct 23.

ASSISTANT: Do you have any connection limit?

USER: I need connecting flight.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I need my depart flight at morning time.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Thanks for your details, there are no flights found in the morning time.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for opting us.