You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you today?

USER: I want to change my reservation as my plan  to got for trekking got postponed. Can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Robert Lee.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your name. Can you please share your trip dates?

USER: I would start my trip on June 4th and return on 6th.

ASSISTANT: Please share your airport codes?

USER: My origin is LAX and destination is DEN.

ASSISTANT: May I know your connection limit?

USER: I need 1 stop over.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need to depart in the evening and would prefer an economy class.

ASSISTANT: We found a direct flight 1003 in Spirit airline with fare 100 and class is economy  with depart time is 20:00 PM. Shall I proceed?

USER: Fine, please proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for your support.

ASSISTANT: Thank you.