You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Emily Carter here. Can you please help me in booking a ticket from AUS to IAH?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: Sure, my journey dates are 07/23 and 07/25.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.