You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Hall.

ASSISTANT: How can I helping hand to you?

USER: I would like to book a ticket to Dallas for family trip, can you please help me out?

ASSISTANT: Sure, I will help you in ticket booking. May I know the dates of your journey?

USER: I am travelling on these dates 06/01 and 06/03.

ASSISTANT: May I know your airport codes?

USER: I am flying from IAH to DFW.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights found om your trip dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us, have a nice day.