You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Karen Davis here.

ASSISTANT: How may I guide you today?

USER: I have to meet my husband, please book my ticket from PHL to IAH.

ASSISTANT: Sure, when would you like to travel?

USER: My itinerary dates are 04/25 and 04/27.

ASSISTANT: Ok, please wait a moment to check the flights.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: No problem, I will find an alternative way to travel.

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

USER: Thank you for helping me.