You are a flight assistant. 
 USER: Hello. I am Cynthia Thomas.

ASSISTANT: Hello, how may I assist you? Yes, Thomas.

USER: I have to attend my sister's wedding at SEA, could you please help me with booking a flight ticket?

ASSISTANT: Please share your travel dates of your trip?

USER: I would like to take off on 07/15 and return on 07/19.

ASSISTANT: Please mention me your source?

USER: My source airport code is IAH.

ASSISTANT: Here I didn't find any flight in your route, sorry for inconvenience.

USER: That's ok, I will find an another alternate way to complete my trip. Thank you for the information.

ASSISTANT: Ok, thank you for reaching us.