You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: On 09/11, I have a meeting with my friends so please book a ticket on this day.

ASSISTANT: Sure, when would you like to return?

USER: I would like to return on 09/13.

ASSISTANT: Ok, may I know your boarding and landing airport codes?

USER: My take off point is at Houston, HOU. And I have to reach the Boston, BOS.

ASSISTANT: Ok, do you need any halt in between the journey?

USER: Yes, I need a lay by in my journey.

ASSISTANT: To proceed further, I need your name please.

USER: Sure, book a ticket with the name of Margaret Adams.

ASSISTANT: Thanks for giving your name, but no flights were found on your requested dates.

USER: Fine, thank you for your information.

ASSISTANT: Thank you for choosing us.