You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for the day?

USER: I would like to book a flight ticket to DTW from HOU, could you please search any inexpensive flight?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Elizabeth Campbell.

ASSISTANT: Ok, please provide your desired dates for the following journey.

USER: I prefer to travel on 01/25 and 01/27.

ASSISTANT: Elizabeth Campbell, I am so sorry to inform you but there is no flight available for your journey.

USER: It's ok, I will choose any other alternative source to reach my destination.

ASSISTANT: Sorry for the inconvenience, thank you for choosing us.

USER: Thank you for the information.

ASSISTANT: Have a great day ahead.