You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth White.

ASSISTANT: How may I be your helping hand today?

USER: Could you please help me in flight ticket booking process from DEN to MSP?

ASSISTANT: Sure, may I know your class preference?

USER: I am ok with any class.

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

USER: Thank you for your response, I want to take off on Jan 29 and book my return ticket also on Jan 31.

ASSISTANT: Ok, at what time would you like to depart and return?

USER: I would like to return in evening time.

ASSISTANT: Ok, do you have any other requirements?

USER: I want a direct flight so please check with this.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

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

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.