You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you please book a flight ticket in economy class to attend a meeting in New York?

ASSISTANT: Sure, could you please share your take off and landing airport codes?

USER: My airport codes are, HOU to JFK.

ASSISTANT: Could I have your journey dates, please?

USER: My journey dates are on Oct 16th and 18th.

ASSISTANT: Please let me know your connection limit?

USER: I prefer a flight with single connection.

ASSISTANT: Are there any more specifications?

USER: My depart time should be in the evening.

ASSISTANT: May I know your good name to proceed further?

USER: My name is Andrew Green.

ASSISTANT: Sorry to say this, there are no flights available as per your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.