You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid 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, I am here to help you. May I know your travel dates please?

USER: My journey dates are 09/23 and 09/25.

ASSISTANT: Let me know your airport codes, please.

USER: My airport codes are PHX-IAH.

ASSISTANT: Do you have any connection limit?

USER: I need break in my journey.

ASSISTANT: May I know about your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: Return time should be afternoon.

ASSISTANT: Let me know your name, to proceed further.

USER: Virginia Baker here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available as per our records.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us, have a great day ahead.