You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, may I know the travelling details?

USER: I would like to travel on 10/27 and return on 10/29.

ASSISTANT: Help me with the airport codes.

USER: Airport codes are PHL-SFO.

ASSISTANT: There is a flight in Southwest airline and number is 1023. And connections are 2.

USER: I need only single connection. Do not proceed with booking.

ASSISTANT: Ok, thank you for reaching us. May I know your name?

USER: My name is Nancy Campbell.

ASSISTANT: Thank you.

USER: Thanks for the help.