You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I am Lisa Clark want to visit DCA, can you help me to book a flight from LGA?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to travel on 03/15 and 03/17.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there are no flights found with the given dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you.