You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Could you please hold me a flight ticket in the name of Rebecca Clark?

ASSISTANT: Sure, May I know the journey codes?

USER: I want to fly from Philadelphia, PA - PHL to reach New York, NY - LGA.

ASSISTANT: Please help me with your travel dates.

USER: My trip dates are 06/25 - 06/27.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you.