You are a flight assistant. 
 USER: Hello. I am Larry White.

ASSISTANT: Hello, how can I support you today?

USER: Will you please book a flight with a price of 1000?

ASSISTANT: Sure. May I know your boarding and landing points?

USER: I am travelling from Chicago, ORD to New York, LGA to meet my childhood friend.

ASSISTANT: Ok. Kindly, mention your travelling dates.

USER: My planned dates to travel to meet my friend is 12/12 to 12/14.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thanks for being patience, there is no flights found on your given requirements.

USER: Thank you.

ASSISTANT: Thank you.