You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are 07/05 and 07/07.

ASSISTANT: Can you please help me with your airport codes?

USER: My airport codes are LAS-HOU.

ASSISTANT: Do you have any specifications?

USER: I am comfortable with business class.

ASSISTANT: May I know your name?

USER: Ruth Williams here.

ASSISTANT: Sorry, there were no flights found on your specifications.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.