You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you book a flight from Atlanta to meet my friends at Houston?

ASSISTANT: Sure, could I have your name please?

USER: My name is Edwards Lopez.

ASSISTANT: Ok, could you please share your location airport codes?

USER: My source point is ATL and my destination is IAH.

ASSISTANT: Ok, may I know your travelling dates?

USER: I will fly on July 20 and return on July 22.

ASSISTANT: Ok, do you have any other specifications?

USER: I prefer a connecting flight.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome, have a great day.