You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jerry Phillips. Can you please help me in flight ticket booking process from SEA to DEN?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Thank you for your response, I want to take off on May 17 and book my return ticket also on May 19.

ASSISTANT:  Do you have any class preference?

USER: No.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to take off on afternoon time.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for your time.