You are a flight assistant. 
 USER: Hello, I am Catherine Harris.

ASSISTANT: Hello, how can I serve you now?

USER: I would like to visit Mount Evans at Denver, can you please book me a ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My preferable airport codes are from PHL to DEN.

ASSISTANT: When do you planned your journey dates?

USER: I would like to leave between 05/09 and 05/11.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need one connection limit.

ASSISTANT: There is a flight found with Hawaiian airline of flight number 1021 and fare is 100. Shall I proceed for booking?

USER: Ok, please book this ticket.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your help.

ASSISTANT: Thanks for approaching us and have a great day.