You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I have to go MSP in 4th month  for my film shooting purpose, can you please book a flight ticket from Houston?

ASSISTANT: Sure, I am happy to help you. Can you please provide your itinerary travelling dates?

USER: Thanks. I would like to  departure on 20th and please book my return ticket also on 22nd.

ASSISTANT: Ok, may I know your origin airport code to proceed further?

USER: My source airport is IAH.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Make sure that I want 1 halt in between my journey.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your requested planning dates.

USER: Oh! So sad to hear that, I will go with another airline service.

ASSISTANT: Thank you for reaching us, have a great day. Can you please provide your name for a documentation purpose?

USER: You are welcome. Sure, my name is Timothy Miller.

ASSISTANT: Ok Timothy, thank you.