You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Nicole Rodriguez. I want to book a ticket to meet my friends at Boston, can you please help me that?

ASSISTANT: Sure, I am here to help you but I need your period of journey to search available flight for you.

USER: Sure, I would like to leave between 05/03 and 05/05.

ASSISTANT: May I know your travel airport codes?

USER: My airport codes are from PHL to BOS.

ASSISTANT: Sorry, I could not find any flight with your details.

USER: That's not a problem. Thank you for help.

ASSISTANT: It's my pleasure.