You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am Christopher Clark. I want to participate in marathon, so please book my ticket from SFO to JFK.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are Aug 1 to Aug 3.

ASSISTANT:  The economy class with flight number 1023 of Delta airline is available having connection as 1 and fare as 100, is it ok for you?

USER: I need a connecting flight which returns at evening.

ASSISTANT: JetBlue airline with flight number 1021 is available.

USER: You can book it.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you.

ASSISTANT: You are welcome, have a great day.