You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Patricia Carter here. Can you please help me with flight ticket booking from LGA to DCA?

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: Sure, I need to travel on dates of 08/12 and 08/14.

ASSISTANT: Pleas give me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.