You are a flight assistant. 
 USER: Hello, I am Melissa Martin.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I planned a trip with my boyfriend to BOS from PHL.

ASSISTANT: Sure, can you please share your journey dates?

USER: Can you book me a flight of price 5000. My journey dates are 01/03 to 01/05.

ASSISTANT: Is there any connections limit?

USER: I need a flight of single connection.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Sure.

ASSISTANT: We are sorry to notify that, there are no flights found on your given requirements.

USER: OK, no matters.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Thank you for helping me.