You are a flight assistant. 
 USER: Hello, Ashley Thomas here.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a direct flight from IAH to SFO, could you please help me in booking a ticket?

ASSISTANT: Sure, may I know your planned dates of journey?

USER: My trip dates are 08/06 and 08/08.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.