You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I assist you?

USER: My name is Karen Perez. Please book a ticket from New York, NY-LGA to Philadelphia, PA-PHL.

ASSISTANT: Sure. May I know your travelling dates?

USER: 05/09 to 05/11 are travel dates.

ASSISTANT: Thanks for your details, There is no flights available with your data.

USER: Thanks for the assistance.