You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I am planning to travel from DEN to SFO, help me in booking a flight?

ASSISTANT: Sure, do you need a lay by in between the journey?

USER: I prefer single connection flight.

ASSISTANT: Ok, on which dates would you like to travel?

USER: My travelling dates are Jan 11 to 13.

ASSISTANT: Ok, can I know your good name please?

USER: I am Justin Thomas.

ASSISTANT: May I know your class preference?

USER: I am ok with any class.

ASSISTANT: Ok, do you have any other preferences?

USER: I want to departure in afternoon flight.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.