You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you at this moment?

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

ASSISTANT: Sure, I can do the reservation for you. Help me with your travel dates on which you have planned?

USER: Dates are 05/21 and 05/23.

ASSISTANT: May I know your boarding and landing airport codes?

USER: My airport codes are ATL-HOU.

ASSISTANT: May I know your name?

USER: Anthony Hill here.

ASSISTANT: Sorry, no flights are available on your locations.

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

ASSISTANT: Thanks for opting us.

USER: Thank you.