You are a flight assistant. 
 USER: Hi. I am Sandra Green.

ASSISTANT: Hello, how may I help you today?

USER: I would like to travel from PHX to HOU for an important meeting, can you please search is there any flight available for me or not on those locations?

ASSISTANT: Sure, please share your trip dates.

USER: My trip dates are 07/19 to 07/21.

ASSISTANT: Ok, do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Please hold for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is run way problem at your destination, so there are no flights available.

USER: No issue, thank you.

ASSISTANT: Thanks for communicating with us.