You are a flight assistant. 
 USER: Hi, I am Nancy Miller.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me with booking a flight ticket from LAS to HOU?

ASSISTANT: Sure, please share your travelling dates.

USER: Travelling dates are 01/21 and 01/23.

ASSISTANT: Do you have any connection preference?

USER: I need a connecting flight.

ASSISTANT: Do you have any class preference?

USER: No class preference.

ASSISTANT: Do you have any other specifications on your trip?

USER: I would like to depart at evening.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there. Thank you.

ASSISTANT: Thank you for reaching us, have a good day.