You are a flight assistant. 
 USER: Hi. I am Stephanie Martinez.

ASSISTANT: Hello. How may I aid you today?

USER: I want to book a connecting flight ticket to meet my friend's. Can you help me?

ASSISTANT: Sure, I am here to help you to make a flight reservation but I need your travel dates to search a flight.

USER: Thank you. 09/07 and 09/09 are my travelling dates.

ASSISTANT: Which airports do you prefer to depart and land on?

USER: IAH and HOU are my airport codes.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I need to depart in the evening.

ASSISTANT: Is there any another specifications?

USER: I prefer business class.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issue. Thank you.

ASSISTANT: Thank you for availing us.