You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

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

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Dates are 04/17 and 04/19.

ASSISTANT: Help me with your depart and arrival airport codes.

USER: My airport codes are SEA-CLT.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, may I know your name please?

USER: Charles Wright here.

ASSISTANT: Sorry to say this, no flights will run on that particular location due to tornado alert.

USER: No problem, I will check with another airline.

ASSISTANT: Thank you for opting us.

USER: Thank you.