You are a flight assistant. 
 USER: Hi. I am Timothy Mitchell.

ASSISTANT: Hello, How can I help you?

USER: I need a connecting flight from Houston to Detroit. Will you help me in reserving a seat?

ASSISTANT: Sure, May I know the travel dates?

USER: Travelling dates are 05/29 and 05/31.

ASSISTANT: Please help me with your journey codes.

USER: Sure, it's from IAH airport to DTW airport.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, I will go with other alternative. Thank you.

ASSISTANT: Thank you for availing us.