You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Christopher Scott.

ASSISTANT: How can I provide assistance to you?

USER: I want to book a flight ticket on 09/18 and return on 09/20, so can you help  me with booking please?

ASSISTANT: Sure, I am mirthful to help you.

USER: Thank you.

ASSISTANT: Kindly assign your boarding and landing airport codes?

USER: Sure, my airport codes are DC-IAD  and CA-LAX.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Please hold on for a moment.

USER: Ok.

ASSISTANT: There is a flight from Frontier airline of fare 100 and flight number 1024. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your flight reservation is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.