You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand?

USER: As I am a scientist, I want to attend science festival with my students at Seattle. Can you do the reservation?

ASSISTANT: Sure, can I know your name?

USER: Helen Roberts here.

ASSISTANT: May I know your airport codes?

USER: My airport codes are AUS-SEA.

ASSISTANT: Can I know your travelling dates?

USER: Dates are 05/26 and 05/28.

ASSISTANT: Sorry, there are no flights on your preferred dates.

USER: No problem, Thank you.

ASSISTANT: Thank you for choosing us.