You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michelle Martinez here.

ASSISTANT: How can I help you?

USER: I would like to travel from JFK to HOU to visit Houston, can you please help me to reserve my ticket?

ASSISTANT: On which dates you like to travel?

USER: Sure, my dates of journey is from 12/26 to 12/28.

ASSISTANT: I am sorry no flights available on your route.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: That's ok. Thank you for choosing us.