You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Gonzalez.

ASSISTANT: What can I do for you today?

USER: I am looking for a connecting flight, could you please help me with booking a flight ticket with my requirement?

ASSISTANT: Sure, please share your preferred travelling dates?

USER: I would like to depart on May 23rd and return on May 25th.

ASSISTANT: Ok, provide your class preference.

USER: I am comfortable with any class.

ASSISTANT: Ok, at what time would you like to depart and return?

USER: Make sure that my depart time must be evening.

ASSISTANT: Ok, help me with your airport codes?

USER: My source airport code is HOU and destination airport code is IAH.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure, take your time.

ASSISTANT: There are no flight found on your requested dates.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.