You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have to attend music event at Phoenix, can you please help me to book a flight ticket from BOS to PHX?

ASSISTANT: Can you share me your trip dates?

USER: Sure, my journey dates are Apr 28 and Apr 30.

ASSISTANT: Do you need any connections?

USER: I need a single connection flight.

ASSISTANT: Are there any preferences?

USER: My depart time is morning. My class preference is economy.

ASSISTANT: May I know your name?

USER: My name is Helen Garcia.

ASSISTANT: Sorry, there is no flight found with your details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.