You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jeffrey Jackson.

ASSISTANT: How may I assist you now?

USER: Can you help me with booking ticket from LAS to SEA, to meet my brother on his birthday?

ASSISTANT: Jeffrey Jackson, may I know your travelling dates?

USER: Ok, my trip dates are from Jan 16 to 18.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a flight with normal-cost.

ASSISTANT: Sorry, no flights are available for you with normal cost.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.