You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Adams here.

ASSISTANT: What help that you need from my side?

USER: Can you please help me with booking a flight ticket from IAH to HOU?

ASSISTANT: Sure, I will help you and may I know your preferable travel dates?

USER: My preferable travel dates are Dec 15 and Dec 17.

ASSISTANT: Do you need drop in your journey?

USER: I need a connecting flight in my journey.

ASSISTANT: Is there any specific depart and arrival time for this trip?

USER: Yes, my depart time should be in the morning.

ASSISTANT: Thank you for your information, sorry to inform you that non of the airline is providing a flight on your travel dates and locations to book a ticket.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: You are most welcome and have a nice day.