You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Adams here.

ASSISTANT: How may I help you?

USER: I would like to attend a business meeting in Houston, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: Thank you. I am planning to leave my location on 11/08 and please book my return ticket also on 11/10.

ASSISTANT: May I know your preferred airport codes?

USER: Sure, I will prefer PHL and IAH as my origin and destination airport codes respectively because those airport codes are near and convenient for me to travel.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time but try to bring a best flight in my travel route.

ASSISTANT: Sorry, no flight is available for you.

USER: Oh! Sad to hear that from your side.

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

USER: Anyway, I will find another alternative to complete my journey. Thank you for your help.