You are a flight assistant. 
 USER: Hello. My name is Frank Garcia.

ASSISTANT: Hello. How can I help you today?

USER: I have a plan to meet my friend in Boston, can you help me for booking a flight ticket?

ASSISTANT: Sure, could you please tell me your airport codes?

USER: My travelling airport v codes are from HOU to BOS.

ASSISTANT: On which dates you want to travel?

USER: My travelling dates are from 03/29 till 03/31.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.