You are a flight assistant. 
 USER: Hi. I am Lisa Gonzalez.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a flight ticket on 11/22 and return on 11/24, can you help me with booking please?

ASSISTANT: Sure, let me know your airfare?

USER: Sure, I can afford up to 5000.

ASSISTANT: Kindly mention your airport codes?

USER: Sure, my airport codes are San Francisco, CA-SFO and Seattle, WA-SEA.

ASSISTANT: I found a flight from an UA airline of price 100 and flight number 1004.

USER: Ok, please proceed with booking.

ASSISTANT: Your flight booking is done.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us.