You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit Houston, can you please book me a ticket from LGA to IAH?

ASSISTANT: Sure, can I know your connection limit?

USER: I prefer direct flight for this trip.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Ok, may I know your travel dates?

USER: My planned dates of journey are Dec 23 and Dec 25.

ASSISTANT: Any other requirement to be met?

USER: No, thanks for asking.

ASSISTANT: Please let me know your name to proceed further?

USER: My name is Emma Smith.

ASSISTANT: Sorry, no flight found as per your request.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for contacting us.