You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you please book a ticket from IAH to HOU? As I need to attend a meeting.

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: Sure, my planned departure and return travel dates are 25th and 27th of April.

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

USER: No, I have no issues regarding that.

ASSISTANT: May I know your connection limit for this trip?

USER: Yes, it is 1.

ASSISTANT: Do you have any another specifications?

USER: I prefer economy class and I want to travel in normal-cost airlines.

ASSISTANT: May I know your name for further process?

USER: Yes, my name is Mary Martin.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates?

USER: That. That's ok, thank you.

ASSISTANT: Thank you for reaching us.