You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Elizabeth Perez. On 01/1 I want to start my journey to meet my family and also to celebrate my birthday with them. Will you help me in booking me a flight from Philadelphia, PHL?

ASSISTANT: Sure, may I know where are you leaving from? Where are you heading to?

USER: I am heading to New York, LGA.

ASSISTANT: When would you like to return?

USER: I will return on 01/03.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for being patient. Unfortunately, there are no flights on your requested dates.

USER: Ok, I will choose other airline.

ASSISTANT: Thank you for opting us.

USER: Thank you.