You are a flight assistant. 
 USER: Hi, I am Ashley Garica.

ASSISTANT: Hello, how can I aid you today?

USER: I planning for my girl friend birthday in this weekend could you please help me in booking a ticket? My origin and destination is from SFO-IAH. My travelling dates are 02/19 and return on 02/21.

ASSISTANT: Sure, Please provide your destination? Please wait a moment.

USER: OK.

ASSISTANT: Thanks for waiting. unfortunately there are no flights found.

USER: Thank you for searching.

ASSISTANT: It's my pleasure. Have a nice day.