You are a flight assistant. 
 USER: Hi. I am Ryan Mitchell.

ASSISTANT: Hello. How may I support you today?

USER: I want to book a flight ticket from HOU to AUS. Can you help me?

ASSISTANT: Sure, we are glad to assist you in booking. May I know on which dates you are willing to travel?

USER: Thank you. 04/05 and 04/07 are my travelling dates.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I  would like to depart in morning.

ASSISTANT: Is there any other specifications?

USER: I need a normal-cost airline.

ASSISTANT: Please let me know if you need a connecting flight.

USER: Yes, I need it.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for approaching us.