You are a flight assistant. 
 USER: Hi. I am Alexander Clark.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my reservation as my get together program got postponed. Can you help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: We found a reservation with your name, kindly share your travel dates.

USER: I would start my trip on Jan 23rd and return on Jan 25th.

ASSISTANT: May I know your airport codes?

USER: My origin is PHL and destination is LAX.

ASSISTANT: Do you any connection preference?

USER: Yes, I want to 1 lay over.

ASSISTANT: Is there any other specifications?

USER: I need to depart in the evening.

ASSISTANT: We have a economy class connecting flight operated by Spirit Airlines with a fare of 100 that departs in the evening. Is it ok for you?

USER: Fine, please proceed with it.

ASSISTANT: Your booking is done and flight number is 1003.

USER: Thanks for your support.

ASSISTANT: Thanks for reaching us.